वर्गमूल सर्पिल में (OA=1) और (AB=1) हो तथा \(AB \perp OA\), तो (OB) की लंबाई क्या होगी?
In a square root spiral, if (OA=1), (AB=1), and \(AB \perp OA\), what is the length of (OB)?
Explanation opens after your attempt
B. \(\sqrt{2}\)
Concept
By Pythagoras theorem, \(OB^2=1^2+1^2=2\), so \(OB=\sqrt{2}\). In exams, identify the right triangle first.
Why this answer is correct
The correct answer is B. \(\sqrt{2}\). By Pythagoras theorem, \(OB^2=1^2+1^2=2\), so \(OB=\sqrt{2}\). In exams, identify the right triangle first.
Exam Tip
पाइथागोरस प्रमेय से \(OB^2=1^2+1^2=2\), इसलिए \(OB=\sqrt{2}\)। परीक्षा में समकोण त्रिभुज को पहले पहचानें।
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